Question

I can easily create and object in a lot of different. For example like this:

var myObject = {
    myFunction: function () {
        return "";
    }
};

So if I alert this object I get something this:

[object Object]

Now I’m if I alert the NaN object I get this:

NaN

And I can still call function from it:

alert(NaN.hasOwnProperty().toString());

So my question is how can I create a object like the NaN object?

1. If I alert it, it should return something like myObject
2. I should be able to create and call functions on it like myObject.myFunction();

Answer 1

Only objects that are created using a constructor function get their class name displayed using console.log(), as shown in @Esalijia’s answer.

Even then, it’ll be the class name that’s displayed, not the name of whatever variable you happened to assign the object to.

Adding a toString() method to the object will however change the output of the alert() function, since that always looks for the presence of that method and use it if it exists.

So, writing:

var myObj = {
    toString: function() { return "boo"; }
}
alert(myObj)

will show boo in the alert box, instead of [Object object].